US10005252B2 - Screw press - Google Patents

Screw press Download PDF

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Publication number
US10005252B2
US10005252B2 US14/351,342 US201214351342A US10005252B2 US 10005252 B2 US10005252 B2 US 10005252B2 US 201214351342 A US201214351342 A US 201214351342A US 10005252 B2 US10005252 B2 US 10005252B2
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United States
Prior art keywords
screw
screen pipe
screw press
shaft
pipe
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Expired - Fee Related, expires
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US14/351,342
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US20150224730A1 (en
Inventor
Roland Kanzler
Rudolf Stadlauer
Johannes Knafl
Wolfgang Magor
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Andritz AG
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Andritz AG
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Assigned to ANDRITZ AG reassignment ANDRITZ AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STADLAUER, RUDOLF, KNAFL, Johannes, KANZLER, ROLAND, MAGOR, WOLFGANG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/121—Screw constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/122—Means preventing the material from turning with the screw or returning towards the feed hopper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/16—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with two or more screws or worms
    • B30B9/166—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with two or more screws or worms the screws being coaxially disposed in the same chamber

Definitions

  • the invention relates to a screw press with a shaft and helical flight mounted on it, where the flight becomes a freely projecting flight at the inlet area of the screw press.
  • dewatering screw presses are used to separate liquids from the solids suspended in them.
  • a lot of these thickening and dewatering units are used in the pulp and paper industry in particular because this sector always works with mixtures of water and fibres—in other words suspensions.
  • Dewatering screw presses have proved to be particularly efficient machines for thickening suspensions with a solids content of 3.5% to 4% at the inlet to between 25 and 35% solids content at the outlet.
  • a description of a screw press of this kind can be found, for example, in AT398 090.
  • JP 63154297 A describes a (vertical) filter with a compression screw, where there is no further dewatering in the compression sector.
  • the aim of the invention is thus to increase the screening area within the given length and diameter.
  • this is achieved by providing a pipe in the inlet area of the screw press over which the freely projecting flight brushes and where preferably a gap is provided between pipe and flight.
  • the screening area available in the inlet area of the dewatering screw press is enlarged by a factor in the range of 1.5 to 1.8.
  • both the dewatering and the throughput capacity of the screw press are increased.
  • a favourable embodiment of the invention is characterised in the shaft journal of the screw press being surrounded by the freely projecting flight, where the shaft journal is surrounded by the fixed pipe.
  • a favourable development of the invention is characterised in the fixed pipe being a screen pipe, where the fixed pipe may also have grooves or microscopic/macroscopic surfaces that counteract the co-rotation.
  • An advantageous embodiment of the invention is characterised in the fixed pipe having at least one filtrate channel, where the filtrate channel can be formed by another pipe between the fixed pipe and the shaft journal.
  • An advantageous development of the invention is characterised in the filtrate channel being divided into several filtrate channels that are separated from one another by means of web plates.
  • FIG. 1 shows a screw press according to the invention
  • FIG. 2 shows the inlet area of a screw press according to the invention
  • FIG. 3 shows a screw shaft according to the invention.
  • a screw press 1 as in FIG. 1 consists of an inlet casing 2 , an outlet casing 3 , a screw shaft 4 with one or more helical screw flights 5 mounted on the screw shaft, where these screw flights 5 can be continuous or discontinuous, and a casing shell 6 surrounding this screw shaft 4 .
  • a conveying gap 7 for the suspension to be dewatered is then formed between the casing shell 6 , the screw shaft 4 , and the helical screw flight 5 . This conveying gap 7 can change its geometry along the axis of the screw shaft 4 , however this is not essential.
  • the principle of the screw press 1 is as follows:
  • the screw shaft 4 which is supported in the casing shell 6 and on bearings, is set in rotating motion by a drive of any kind.
  • a suspension is fed in through the inlet casing 2 connected to the casing shell 6 .
  • the rotating shaft 4 moves this suspension through the helical screw flight 5 within the conveying gap 7 in the direction of the outlet casing 3 connected to the casing shell 6 .
  • the casing shell 6 of a dewatering screw press 1 is usually designed as a screen.
  • the conveying gap 7 formed by the shaft 4 , the screw flight 5 and the casing shell 6 changes its geometry along the shaft axis in the direction of the outlet casing 3 in a way that is beneficial to dewatering.
  • the volume available is reduced along the length of the shaft axis in order to force dewatering of the suspension.
  • the liquid released in this process is drained off through the casing shell, which is designed as a screen.
  • the screw flight 5 becomes a freely projecting helical flight 8 .
  • the flighting need not necessarily have two flights (as shown). In order to increase the stability of the flight, it could also be reinforced with a U-profile.
  • a gap is provided between the fixed pipe 9 and freely projecting flight 8 in the inlet area of the screw press 1 , along which the flight 8 can brush against fibres that have accumulated on the fixed pipe 9 .
  • This pipe 9 is connected securely to the frame of the screw press 1 and does not make any rotating movement.
  • the pipe 9 secured to the press frame is preferably designed as a screen, which enlarges the screening area enormously in the inlet area of the press 1 .
  • the pipe 9 need not be designed as a screen pipe, but can also have any kind of groove or a macroscopically or microscopically rough surface. The co-rotation is counteracted by this surface as well as by the grooves or a screen. In addition to better dewatering, this has the effect of stopping the solids suspension (fibrous suspension) from adhering to the metallic surface, thus also guaranteeing solids transport in axial direction.
  • the shaft journal 10 of the conventional screw shaft 4 runs through the pipe 9 secured to the frame of the press 1 and is then supported in conventional bearings after passing through the casing.
  • FIG. 2 shows the inlet part 2 of a screw press 1 according to the invention.
  • the suspension enters the inlet branch 11 .
  • the entire inlet part is connected to the casing shell 6 by a flange 12 in the embodiment shown.
  • the inlet part can also have a different design.
  • the inlet part 2 has a pipe 9 firmly secured to it, for example as shown here by means of screws.
  • This figure also shows that a concentric pipe 13 with a larger diameter than the shaft journal 10 (not shown) is provided. Pipes 9 and 13 thus form a filtrate channel 14 .
  • This filtrate channel 14 can also be divided into several filtrate channels separated from one another by web plates.
  • the filtrate collected in the pipe 9 is then carried through the filtrate channel 14 to the filtrate collecting flange 15 and guided through a filtrate collecting pan 16 into the filtrate tray 17 ( FIG. 1 ) of the screw press, for example, in this embodiment.
  • FIG. 3 now shows a section through a screw shaft 4 .
  • the (conventional) screw flight 5 is visible here, as well as the projecting flight 8 and the shaft stub 10 .
  • the screening surface in the inlet area 2 of the screw press 1 is enlarged by a factor of 1.5 to 1.8. This results in a significant increase in the dewatering capacity of the press 1 .
  • the pulp is prevented from adhering to the rotating screw shaft 4 in the inlet area because only a stationary pipe 9 is installed in the inlet area 2 .
  • the pipe 9 is preferably designed as a screen, but may also have any kind of grooves or a macroscopically or microscopically rough surface. These grooves or macroscopically or microscopically rough surface can also be applied to a pipe 9 designed as a screen.
  • the screw shaft 4 or rather the journal 10 rotates inside this pipe 9 .
  • Both the screen-type casing shell 6 and the screen pipe 9 used in the inlet area 2 prevent the pulp from rotating.
  • the projecting flight 8 brushes over the screen pipe 9 and transports the pulp forwards in axial direction only. This leads to a considerable increase in transport efficiency and thus to increased removal of material from the inlet area 2 of the press 1 , which causes a rise in the inlet mass flow.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtration Of Liquid (AREA)
  • Treatment Of Sludge (AREA)
  • Paper (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

The invention relates to a screw press (1) comprising a shaft (4) and a spiral helix (5) provided thereon, wherein the helix (5) goes over in the inlet region (2) of the screw press (1) into a freely projecting helix (8). It is principally characterized in that a tube (9) is provided in the inlet region (2) of the screw press (1). As a result, on the one hand the screen area can be increased greatly in size, on the other hand the co-rotation of the suspension with the shaft can be reduced or avoided.

Description

The invention relates to a screw press with a shaft and helical flight mounted on it, where the flight becomes a freely projecting flight at the inlet area of the screw press.
In general, dewatering screw presses are used to separate liquids from the solids suspended in them. A lot of these thickening and dewatering units are used in the pulp and paper industry in particular because this sector always works with mixtures of water and fibres—in other words suspensions. Dewatering screw presses have proved to be particularly efficient machines for thickening suspensions with a solids content of 3.5% to 4% at the inlet to between 25 and 35% solids content at the outlet. A description of a screw press of this kind can be found, for example, in AT398 090. JP 63154297 A describes a (vertical) filter with a compression screw, where there is no further dewatering in the compression sector. DE 299 01 683 U1 describes a screw press with damming cones and an axially displaceable hollow shaft. In addition, dewatering units are known from U.S. Pat. No. 5,857,405 A and US 2004/0178053 A1, where materials are conveyed into a pipe by means of free flighting and compacted there. In particular, the screening area available is proving to be problematic in state-of-the-art dewatering screw presses. This is the factor that limits dewatering. The larger the screening area is, the greater the dewatering capacity of the press. The screening area is currently defined almost entirely by the diameter and length.
The aim of the invention is thus to increase the screening area within the given length and diameter.
According to the invention, this is achieved by providing a pipe in the inlet area of the screw press over which the freely projecting flight brushes and where preferably a gap is provided between pipe and flight. As a result, the screening area available in the inlet area of the dewatering screw press is enlarged by a factor in the range of 1.5 to 1.8. Here, both the dewatering and the throughput capacity of the screw press are increased.
An advantageous development of the invention is characterised in the pipe have a fixed design and being connected to the frame of the screw press. This ensures that the liquid is carried away properly without creating any difficulties with sealing.
A favourable embodiment of the invention is characterised in the shaft journal of the screw press being surrounded by the freely projecting flight, where the shaft journal is surrounded by the fixed pipe.
A favourable development of the invention is characterised in the fixed pipe being a screen pipe, where the fixed pipe may also have grooves or microscopic/macroscopic surfaces that counteract the co-rotation.
An advantageous embodiment of the invention is characterised in the fixed pipe having at least one filtrate channel, where the filtrate channel can be formed by another pipe between the fixed pipe and the shaft journal.
An advantageous development of the invention is characterised in the filtrate channel being divided into several filtrate channels that are separated from one another by means of web plates.
In the following, the invention is described on the basis of drawings.
Here:
FIG. 1 shows a screw press according to the invention,
FIG. 2 shows the inlet area of a screw press according to the invention and
FIG. 3 shows a screw shaft according to the invention.
A screw press 1 as in FIG. 1 consists of an inlet casing 2, an outlet casing 3, a screw shaft 4 with one or more helical screw flights 5 mounted on the screw shaft, where these screw flights 5 can be continuous or discontinuous, and a casing shell 6 surrounding this screw shaft 4. A conveying gap 7 for the suspension to be dewatered is then formed between the casing shell 6, the screw shaft 4, and the helical screw flight 5. This conveying gap 7 can change its geometry along the axis of the screw shaft 4, however this is not essential.
The principle of the screw press 1 is as follows: The screw shaft 4, which is supported in the casing shell 6 and on bearings, is set in rotating motion by a drive of any kind. A suspension is fed in through the inlet casing 2 connected to the casing shell 6. The rotating shaft 4 moves this suspension through the helical screw flight 5 within the conveying gap 7 in the direction of the outlet casing 3 connected to the casing shell 6. The casing shell 6 of a dewatering screw press 1 is usually designed as a screen. The conveying gap 7 formed by the shaft 4, the screw flight 5 and the casing shell 6 changes its geometry along the shaft axis in the direction of the outlet casing 3 in a way that is beneficial to dewatering. In most cases, the volume available is reduced along the length of the shaft axis in order to force dewatering of the suspension. The liquid released in this process is drained off through the casing shell, which is designed as a screen. In the area of the inlet casing 2, the screw flight 5 becomes a freely projecting helical flight 8. The flighting need not necessarily have two flights (as shown). In order to increase the stability of the flight, it could also be reinforced with a U-profile. A gap is provided between the fixed pipe 9 and freely projecting flight 8 in the inlet area of the screw press 1, along which the flight 8 can brush against fibres that have accumulated on the fixed pipe 9. This pipe 9 is connected securely to the frame of the screw press 1 and does not make any rotating movement. The pipe 9 secured to the press frame is preferably designed as a screen, which enlarges the screening area enormously in the inlet area of the press 1. The pipe 9 need not be designed as a screen pipe, but can also have any kind of groove or a macroscopically or microscopically rough surface. The co-rotation is counteracted by this surface as well as by the grooves or a screen. In addition to better dewatering, this has the effect of stopping the solids suspension (fibrous suspension) from adhering to the metallic surface, thus also guaranteeing solids transport in axial direction.
The shaft journal 10 of the conventional screw shaft 4 runs through the pipe 9 secured to the frame of the press 1 and is then supported in conventional bearings after passing through the casing.
FIG. 2 shows the inlet part 2 of a screw press 1 according to the invention. The suspension enters the inlet branch 11. The entire inlet part is connected to the casing shell 6 by a flange 12 in the embodiment shown. Of course, the inlet part can also have a different design. The inlet part 2 has a pipe 9 firmly secured to it, for example as shown here by means of screws. This figure also shows that a concentric pipe 13 with a larger diameter than the shaft journal 10 (not shown) is provided. Pipes 9 and 13 thus form a filtrate channel 14. This filtrate channel 14 can also be divided into several filtrate channels separated from one another by web plates. The filtrate collected in the pipe 9 is then carried through the filtrate channel 14 to the filtrate collecting flange 15 and guided through a filtrate collecting pan 16 into the filtrate tray 17 (FIG. 1) of the screw press, for example, in this embodiment.
FIG. 3 now shows a section through a screw shaft 4. The (conventional) screw flight 5 is visible here, as well as the projecting flight 8 and the shaft stub 10.
The present invention offers two advantages over conventional screw presses:
The screening surface in the inlet area 2 of the screw press 1 is enlarged by a factor of 1.5 to 1.8. This results in a significant increase in the dewatering capacity of the press 1.
In addition, co-rotation of the fibre pulp is reduced. Fibre pulps tend to adhere to the rotating shaft. If the fibre pulp adheres to the screw shaft 4, transport in axial direction is reduced or even comes to a halt. The determining factor in this co-rotation is largely the friction conditions prevailing inside the press. In conventional presses and also in the conventional part 4, 5 of the screw press 1, the pulp is prevented from co-rotating by the casing shell 6 of the press 1 designed as a screen. However, the screw shaft 4 tries to set the pulp in a rotating movement. In addition, the pulp adheres to the surface of the screw shaft 4 and then co-rotates at the shaft speed without experiencing any major forward movement in axial direction as it does so. In the present invention, the pulp is prevented from adhering to the rotating screw shaft 4 in the inlet area because only a stationary pipe 9 is installed in the inlet area 2. The pipe 9 is preferably designed as a screen, but may also have any kind of grooves or a macroscopically or microscopically rough surface. These grooves or macroscopically or microscopically rough surface can also be applied to a pipe 9 designed as a screen. The screw shaft 4 or rather the journal 10 rotates inside this pipe 9. Both the screen-type casing shell 6 and the screen pipe 9 used in the inlet area 2 prevent the pulp from rotating. The projecting flight 8 brushes over the screen pipe 9 and transports the pulp forwards in axial direction only. This leads to a considerable increase in transport efficiency and thus to increased removal of material from the inlet area 2 of the press 1, which causes a rise in the inlet mass flow.

Claims (17)

The invention claimed is:
1. A screw press comprising:
a screw including a shaft with helical flight rotatable about an axis;
a casing shell surrounding the screw between an inlet end of the screw and an outlet end of the screw;
an inlet casing connected to the casing shell for delivering a suspension to the inlet end of the screw;
an outlet casing connected to the casing shell for discharging a pressed suspension from the outlet end of the screw;
wherein
the inlet end of the screw includes a flight in the inlet casing;
the flight at the inlet end of the screw freely projects from the screw shaft; and
a screen pipe extends coaxially within the freely projecting flight;
whereby the freely projecting flight rotates closely around the screen pipe as the screw rotates within the casing shell.
2. The screw press of claim 1, wherein the screw press includes a frame and the screen pipe is connected to the frame in a rotationally fixed position within the freely projecting flight.
3. The screw press of claim 2, wherein
the shaft includes a shaft journal extending axially through the inlet casing and supported in a bearing carried by the frame;
the screen pipe coaxially extends in spaced relation around the shaft journal; and
a filtrate channel is defined in the space between the screen pipe and the shaft journal.
4. The screw press of claim 3, wherein the filtrate channel is defined between the screen pipe and another pipe that extends coaxially around the shaft journal.
5. The screw press of claim 3, wherein the screen pipe has a rough surface that counteracts co-rotation of suspension with the freely projecting flight.
6. The screw press of claim 2, wherein
the inlet casing is connected to the frame and has a vertically oriented inlet branch;
the screen pipe extends axially through the vertical branch to a rigid connection on the frame;
a filtrate channel extends axially within the screen pipe to the frame; and
a filtrate collection volume is provided at the connection of the screen pipe to the frame.
7. The screw press of claim 6, wherein the filtrate channel is divided into a plurality of filtrate channels that are separated from each other by web plates.
8. The screw press of claim 2, wherein
the screen pipe coaxially extends in spaced relation around the shaft; and
a filtrate channel is defined in the space between the screen pipe and the shaft.
9. The screw press of claim 8, wherein the filtrate channel is defined between the screen pipe and another pipe that extends coaxially around the shaft.
10. The screw press of claim 1, wherein the shaft includes a shaft journal extending axially through the inlet casing, surrounded by the freely projecting flight.
11. The screw press of claim 1, wherein the shaft includes a shaft journal extending axially through the inlet casing, surrounded by the screen pipe.
12. The screw press of claim 1, wherein the screen pipe has a rough surface that counteracts co-rotation of suspension with the freely projecting flight.
13. The screw press of claim 1, wherein the screen pipe includes a filtrate channel.
14. The screw press of claim 13, wherein the filtrate channel is formed between the screen pipe and another coaxial pipe within the screen pipe.
15. The screw press of claim 1, wherein
the shaft includes a shaft journal extending axially through the inlet casing;
the screen pipe coaxially extends in spaced relation around the shaft journal; and
a filtrate channel is defined in the space between the screen pipe and the shaft journal.
16. The screw press of claim 15, wherein the filtrate channel is defined between the screen pipe and another pipe that extends coaxially around the shaft journal.
17. The screw press of claim 15, wherein the screen pipe has a rough surface that counteracts co-rotation of suspension with the freely projecting flight.
US14/351,342 2011-10-11 2012-09-10 Screw press Expired - Fee Related US10005252B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ATA1475/2011 2011-10-11
ATA1475/2011A AT511982B1 (en) 2011-10-11 2011-10-11 SCREW PRESS
PCT/EP2012/003785 WO2013053418A1 (en) 2011-10-11 2012-09-10 Screw press

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US20150224730A1 US20150224730A1 (en) 2015-08-13
US10005252B2 true US10005252B2 (en) 2018-06-26

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US (1) US10005252B2 (en)
EP (1) EP2766177B1 (en)
JP (1) JP6147260B2 (en)
CN (1) CN103946017B (en)
AT (1) AT511982B1 (en)
BR (1) BR112014008559A2 (en)
CA (1) CA2851289C (en)
CL (1) CL2014000907A1 (en)
RU (1) RU2606820C2 (en)
WO (1) WO2013053418A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10118358B2 (en) * 2014-12-22 2018-11-06 Us Farm Systems, Inc. Screw press for separation of liquid from bulk materials
CN108081430A (en) * 2017-12-14 2018-05-29 王伟 A kind of production equipment of plant fiber or high polymer material composite wood
CN107932961A (en) * 2017-12-21 2018-04-20 中科国兴（北京）科技有限公司 A kind of solid-liquid separating machine
DE102018113135A1 (en) 2018-06-01 2019-12-05 Bernhard Giersberg Device for sewage sludge dewatering
CN110345720A (en) * 2019-08-08 2019-10-18 沈阳远大科技实业有限公司 A kind of screw extrusion dewaterer
CN110526541A (en) * 2019-08-26 2019-12-03 南京爱斯利尔环保设备工程有限公司 A kind of pressafiner
CN113002046B (en) * 2021-03-03 2021-12-14 林美珊 Spiral extrusion type solid-liquid separator
CN113198240A (en) * 2021-05-07 2021-08-03 抚州市第一中医医院(江西中医药高等专科学校附属医院) Traditional chinese medical science cardiovascular medicine residue collection device

Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3085623A (en) * 1960-09-15 1963-04-16 Bauer Bros Co Impregnator
US4121967A (en) * 1976-09-07 1978-10-24 Reinhall P G Screw conveyor in pulp-making equipment
US4202773A (en) * 1977-04-27 1980-05-13 Krauss-Maffei Aktiengesellschaft Apparatus for the dewatering of sludge
US4581992A (en) * 1980-11-15 1986-04-15 Hermann Berstorff Maschinenbau Gmbh Screw press for mechanically separating liquids from mixtures of liquids and solids
US4983256A (en) * 1988-04-06 1991-01-08 Clextral Method for the manufacture of a paper pulp for currency use
US5516427A (en) * 1993-06-16 1996-05-14 Hitachi Zosen Corporation Screw type dewatering machine
US5857405A (en) * 1994-03-07 1999-01-12 Spirac Engineering Aktiebolag Apparatus and method for separating solid matter from a liquid
US5857406A (en) * 1996-04-25 1999-01-12 Andritz-Patentverwaltungs-Gesellschaft M.B.H. Screw press for separating liquids from solid-liquid mixtures
US6096201A (en) * 1996-10-07 2000-08-01 Spirac Engineering Ab Apparatus for separation
US6588331B2 (en) * 2000-12-19 2003-07-08 Voith Paper Inc. Screw press inlet section
US6736054B2 (en) * 2000-02-08 2004-05-18 Advanced Fiber Technologies (Aft) Trust Screw press
US7073433B2 (en) * 2003-03-11 2006-07-11 Jwc Environmental Auger dewatering system
US7143690B2 (en) * 2002-04-18 2006-12-05 Mastec Stålvall Aktiebolag Screw compressor for compressing wet matter and a method for compressing and washing
US7152522B2 (en) * 2004-02-09 2006-12-26 Derek Flor Screw press with radial gate valve and supported screw shaft
US8181570B2 (en) * 2007-06-29 2012-05-22 Metso Paper, Inc. Plug screw feeder for feeding cellulose pulp/chips
US8191470B2 (en) * 2007-11-30 2012-06-05 Andritz Ag Screw shaft surface
US8403127B2 (en) * 2008-03-01 2013-03-26 Karl-Heinz Tetzlaff Biomass transport installation for introduction into a pressurised container
US9610747B2 (en) * 2012-05-25 2017-04-04 Conveyor Eng. & Mfg. Co. Adjustable compression screw press
US9737896B2 (en) * 2014-06-04 2017-08-22 Metawater Co., Ltd. Screw conveyor type separation apparatus and wastewater treatment system

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE332012A (en) * 1925-02-09
JPH0683915B2 (en) * 1986-12-17 1994-10-26 九里化学装置株式会社 Continuous filter with squeeze screw
JPH06695A (en) * 1992-06-18 1994-01-11 Hitachi Zosen Corp Screw type dehydrator
JP2721094B2 (en) * 1992-08-26 1998-03-04 日立造船株式会社 Screw dehydrator
AT398090B (en) * 1992-05-15 1994-09-26 Andritz Patentverwaltung DEVICE FOR SEPARATING LIQUID FROM SOLIDS-LIQUID MIXTURES WITH A SOLIDS RETENTION DEVICE AND DEVICE IN THE FORM OF A SCREW PRESS
DE19805451A1 (en) * 1998-02-11 1999-08-19 Bormet Maschinenbau Gmbh Refuse washer for the removal of toxic substances
DE29901683U1 (en) * 1999-02-01 1999-05-27 Heissenberger & Pretzler Ges. M.B.H., Frohnleiten Screw press
RU2162726C1 (en) * 1999-07-05 2001-02-10 Рязанская государственная сельскохозяйственная академия им. П.А. Костычева Press-filter for separation of suspensions and pressing-out of sediment
JP2004314130A (en) * 2003-04-17 2004-11-11 Ngk Insulators Ltd Screw-press dehydrator
RU2271931C2 (en) * 2004-03-15 2006-03-20 Мичуринский государственный аграрный университет Screw extruded for vegetable raw material pressing
CN1699050B (en) * 2004-05-21 2010-07-14 安德里特斯公开股份有限公司 Spiral extruder for separating liquid from solid-liquid mixture, particularly from pasty suspension
JP4730809B2 (en) * 2004-09-10 2011-07-20 株式会社アマダ Chip discharge device
CN2868659Y (en) * 2005-12-13 2007-02-14 天津百利机电发展有限公司 Organic-matter-dewatering squeezer
CN201109192Y (en) * 2007-09-14 2008-09-03 刘万金 Cattle manure solid-liquid separating machine
CN201626125U (en) * 2010-03-30 2010-11-10 福建省轻工机械设备有限公司 Solid-liquid separation device of screw press

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3085623A (en) * 1960-09-15 1963-04-16 Bauer Bros Co Impregnator
US4121967A (en) * 1976-09-07 1978-10-24 Reinhall P G Screw conveyor in pulp-making equipment
US4202773A (en) * 1977-04-27 1980-05-13 Krauss-Maffei Aktiengesellschaft Apparatus for the dewatering of sludge
US4581992A (en) * 1980-11-15 1986-04-15 Hermann Berstorff Maschinenbau Gmbh Screw press for mechanically separating liquids from mixtures of liquids and solids
US4983256A (en) * 1988-04-06 1991-01-08 Clextral Method for the manufacture of a paper pulp for currency use
US5516427A (en) * 1993-06-16 1996-05-14 Hitachi Zosen Corporation Screw type dewatering machine
US5857405A (en) * 1994-03-07 1999-01-12 Spirac Engineering Aktiebolag Apparatus and method for separating solid matter from a liquid
US5857406A (en) * 1996-04-25 1999-01-12 Andritz-Patentverwaltungs-Gesellschaft M.B.H. Screw press for separating liquids from solid-liquid mixtures
US6096201A (en) * 1996-10-07 2000-08-01 Spirac Engineering Ab Apparatus for separation
US6736054B2 (en) * 2000-02-08 2004-05-18 Advanced Fiber Technologies (Aft) Trust Screw press
US6588331B2 (en) * 2000-12-19 2003-07-08 Voith Paper Inc. Screw press inlet section
US7143690B2 (en) * 2002-04-18 2006-12-05 Mastec Stålvall Aktiebolag Screw compressor for compressing wet matter and a method for compressing and washing
US7073433B2 (en) * 2003-03-11 2006-07-11 Jwc Environmental Auger dewatering system
US7152522B2 (en) * 2004-02-09 2006-12-26 Derek Flor Screw press with radial gate valve and supported screw shaft
US8181570B2 (en) * 2007-06-29 2012-05-22 Metso Paper, Inc. Plug screw feeder for feeding cellulose pulp/chips
US8191470B2 (en) * 2007-11-30 2012-06-05 Andritz Ag Screw shaft surface
US8403127B2 (en) * 2008-03-01 2013-03-26 Karl-Heinz Tetzlaff Biomass transport installation for introduction into a pressurised container
US9610747B2 (en) * 2012-05-25 2017-04-04 Conveyor Eng. & Mfg. Co. Adjustable compression screw press
US9737896B2 (en) * 2014-06-04 2017-08-22 Metawater Co., Ltd. Screw conveyor type separation apparatus and wastewater treatment system

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AT511982A1 (en) 2013-04-15
CN103946017B (en) 2016-08-03
CL2014000907A1 (en) 2014-06-27
JP6147260B2 (en) 2017-06-14
WO2013053418A1 (en) 2013-04-18
CA2851289C (en) 2019-10-01
AT511982B1 (en) 2013-10-15
RU2014116883A (en) 2015-11-20
BR112014008559A2 (en) 2017-04-18
CA2851289A1 (en) 2013-04-18
US20150224730A1 (en) 2015-08-13
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EP2766177A1 (en) 2014-08-20
CN103946017A (en) 2014-07-23

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